C# DirectShow 通过 IAMVideoProcAmp 设置视频属性

修改部分1.

//在Capture的构造函数中和SetupGraph函数中

//            增加亮度传入参数int iBrightness

private void SetupGraph(DsDevice dev, int iWidth, int iHeight, short iBPP, Control hControl,int iBrightness)

{

...

}

修改部分2.

//在SetupGraph函数的如下位置增加对iBrightness的判断

if (iHeight + iWidth + iBPP > 0)

{

     SetConfigParms(pRaw, iWidth, iHeight, iBPP);

}

if (iBrightness > 0)

{

      SetBrightness(capFilter, iBrightness);

}

修改部分3.

//函数实现

private void SetBrightness(IBaseFilter capFilter, int iBrightness)

{

    IAMVideoProcAmp videoProcAmp = capFilter as IAMVideoProcAmp;

    int Val;

    DirectShowLib.VideoProcAmpFlags Flags = VideoProcAmpFlags.Auto;

    videoProcAmp.Get(VideoProcAmpProperty.Brightness, out Val, out Flags);

    if (m_brightness != 0)

    {

        videoProcAmp.Set(VideoProcAmpProperty.Brightness, m_brightness, Flags);

    }

    else

    {

        ...

    }

}

以上仅做简单实现